The 3rd of the Top 11 Labor History Landmarks in New York City is Cooper Union.

The Great Hall at Cooper Union has been the scene of lively public debate since it opened in 1858. At a mass meeting in November 1909, Clara Lemlich, a young Jewish labor organizer gave an impassioned speech (in Yiddish), which inspired a general strike of shirtwaist makers. The owners of the Triangle Factory were among a minority of manufacturers who did not agree to the concessions that ended the strike after 14 weeks.